Temperature compensated meter



April 1948. w w. H. MARSH 2,438,935

TEEPERATURE COMPENSATED METER Original Filed Dec. .8, 1938 4 Sheets-Sheet 1 Y INVENTDR. M/k/H/Vwcsfi.

" (W a XW ATTORNEY.

April 48. w. H. MARSH 2,438,935

TEMPERATURE COIPENSATED METER I v Original Filed Dec. 8, 1938 4 Sheets-Sheet 2 Immu- ///////1 ////////l- I NV ENTOR.

April w. H. MARSH I I 2,438,935

TEMPERATURE COMPENSATED METER "Original File d Dec, 8. 1938 4 Sheets-Sheet 3 I BY ORNEY! TEMPERATURE COMPENSATED METER April 6, 1948. w. H. MARSH Original Filed Dec 8. 1.938 4 Sheets-Sheet 4 INVENTOR.

m (M k ATTORNEY.

Patented Apr. 6, 1948 TEMPERATURE COMPENSATED METER Walter H. Marsh, Grafton, 2a., assignor to Rockwell Manuiacturing Company,

Pennsylvania a corporation of Continuation of application Serial No. 244,596, December 8, 1938. This application June 28, 1943, Serial No. 492,541

26 Claims. (Cl. 73-233) The present invention relates to an improvement in fluid meters, and relates particularly to fluid meters of the positive type driving a register which embodies thermal responsive means between the meter and register for compensating the register from standard calibration for variations in the temperature of the fluid being measured. This application is a continuation of my application, Serial No. 244,596, filed December 8, 1939, for Temperature compensated meter, which has become abandoned and which is a continuation in part of my application for Compensated register drive, Serial No. 34,046, filed July 31, 1935, now Patent 2,191,766, granted February 27,1940.

In the measuring of petroleum products trans ported by pipeline, it heretofore has been the practice to employ drawofi tanks at the various takeoff points, which involved careful timing of temperature readings at the intake and drawofl points. This system of measurement made impossible the interconnecting of pipelines and its obvious economies.

The measurement of flow in pipelines involves a number of problems, and was not practicable even after meters of suitable capacity and of sufficient ruggedness were developed for this purpose, because of the difilculties of temperature compensation. The range of temperature change encountered may be as great as 50 F. and the speeds of operation of the meters may vary from about 25 to 300 revolutions per minute. The temperature compensating mechanism, together with the meter, accordingly must be accurate within plus or minus two per cent throughout this range of operation, and the installation must be durable, compact, trouble-free, and wear of parts must not change the accuracy in such a way as cannot be compensated for by the adjustment of the mechanism. The mechanism also should be readily accessible for servicing or repair or replacement. Heretofore, no temperature compensated mechanism had been developed to meet these requirements.

It, is an object of my invention to provide a fluid meter which will accurately measure the volume of fluid and automatically compensate for variations in temperature out the fluid from a given standard.

A further object is the provision of a fluid meter embodying a thermal compensation which is durable, inexpensive to manufacture, is easily adjusted, is very accurate, and can be readily adapted to various types of meters or registers now commercially available.

According to the present invention, a variable drive means is provided between the meter and register, and temperature responsive means is provided for varying the'drive means to correct for changes in temperature of the fluid being measured. In the preferred embodiment of my invention 1 provide any suitable drive means operatively connecting the register and meter, which may, if desired, be a one way drive means, and I employ one way drive means to over-drive the register when operated in one direction, said one way drive means being adjustable by any suitable temperature responsive element for varying the extent of operation thereof. A manual adjustment also i provided which may be used in initially calibrating the apparatus.

The invention will be described by way of example in connection with a liquid meter and register, reference being made to the accompanying drawings, wherein preferred embodiments of the invention are shown by way of illustration and in which:

Figure 1 is a side elevation of a preferred embodiment of the invention,

Figure 2 is a sectional view of Figure 1 taken on line 11-11,

Figure 3 is a vertical sectional view of the register drive means,

Figure 4 is a diametrical sectional view through a part of the driving means shown in Figure 3,

Figure 5 is an elevation with parts broken away of the preferred one way drive means,

Figure 6 is a plan view of the adjustable drive assembly with the cam track shown in dot and dash lines,

Figure 7 is a diametric'section of a portion of the temperature responsive means,

Figure 8 s a side elevation of a modification, the casing being in section,

Figure 9 is a vertical diametrical section of the modification shown in Figure 8, v

Figure 10 is a horizontal section taken on line XX of Figure 9,

Figure 11 is a plan view of the mechanism shown in Figure 8, with parts broken away, and

Figure 12-is a sectional view similar to Figure 2 of a modification employing ambient temperature compensation.

Referring to Figure 1 of the drawing, there is shown a meter I of any suitable construction having a manifold 2 providing an inlet connection 3 and an outlet connection 4 thereon. Preferably the meter is constructed similar to that disclosed in the application of Walter H. Marsh, Serial No. 179,394, filed December 13, 1937, Patent 3 2,274,206, granted February 24, 1942. A register case is bolted or otherwise secured to the meter and contains the register mechanism adapted to be driven thereby.

As shown in Figure 3, register housing 5 has an internal flange I to which is secured a bottom plate 8 for supporting the register mechanism. The plate 8 is bored centrally at 9 to receive a bushing In in which is journalled the hub ll of a, driving member l2. The driving member l2 has a flattened end |3 (Figure 4) adapted to receive thereon one half H of a coupling member held thereon by a set screw, the other half l5 of the coupling member being secured to the shaft Hi to be driven by the meter through the intermediary of change gears, ifdesired. The couplingpreferably is of the Oldham type, although any suitable coupling means may be employed.

The housing I8 is bolted or otherwise suitably secured to the plate 8 and has a central bore IS -in the top wall 20 with a bushing 2| in the bore,

and one end 22 of an adjustment shaft is journalled in this bushing, the other end 23 (Figure 4) of this shaft being journalled in a recess 25 in the driving member l2. A register 24 of any suitable type is driven by the adjustment shaft through suitable gearing 26. The adjustment shaft has an enlarged portion 21 constituting a clutch drum, and the driving member is recessed at 28 to receive a multiple one way drive assembly. The preferred construction of the one way drive assembly is shown in Figures 4 and 5 and comprises a lower ball clutch driving member 3| surrounding the drum 21 and secured to the driving member 2 by screws or in any other suitable t 55 holds the cam plate in position on face 5|.

The driving member l2 has a flange 53 at the top which is drilled at 59 and receives a pivot pin 6| therein. Preferably the portion of the pivot pin received therein is fluted so that when the pin is driven into place and the end peened over, it will be held securely in position;

A follower arm 82, Figures 4 and 6, is journalled on the pin BI and has an arcuate portion 63 having gear teeth 64 therein which engage the gear teeth of the central gear 48. An extension 65 of the arm is bored at 86 to receive a stud 61 riveted therein, upon which is journalled a ball bearing roller 63, the inner race of which rests on a spacing flange 89, and a retaining washer 10 held in place by riveting the end of the pin manner, and an upper ball clutch driving member 33 surrounding the drum and freely rotatable in the recess. The ball clutch driving members may be of any suitable construction, and in the preferred embodiment clutch member 3| comprises a plurality of clutch discs 35, 36, and 31 riveted together and having recesses 38 therein in which are located hardened steel balls 39 urged inwardly by a suitable spring 4|. The circumferential wall 42 of the recess is inclined toward the center so that when the clutch member is turned clockwise, as viewed in Figure 5, the ball is wedged between the clutch drum 21 and recess wall 42 to grip and rotate the drum, and when the clutch is rotated in the opposite direction the balls idle over the clutch drum. Any desired number of such balls may be provided, and it will be apparent that they may be regarded singly or jointly as a one way drive means. The upper ball clutch assembly 33 is similarly constructed so that when said assembly is caused to rotate clockwise relative to clutch member 3| it drives drum 21 clockwise. The top plate 44 of the upper clutch member has an opening 43 which receives the hub 45 of a gear 45, the hub being suitably secured therein, as by peening the ends of the hub or in any other suitable manner. A spacer sleeve 41 on driven shaft 22 abuts the bushing 2| and gear 46 and prevents the clutch member 33 from rising out of place.

The plate 8 has a hollow hub portion 48 terminating in a substantially plane surface 5| and is drilled at 52 to receive a pivot pin 53 which may be fluted at the lower end to hold it assembled. An adjustment cam 54 has a flange 55 which receives the pivot pin 53 in a close,fitting bore 53a therein, said cam overlying the one way drive mechanism with the shaft 22 passing through a central opening 56 therein, and a spring 51 abutting the top wall 20 and the flange holds the ball bearing roller in position. The cam 54 is recessed to provide two radially spaced tracks II and 12 which receive the roller 68 therebetween with a running clearance. Diametrically opposite hole 53a the cam flange 55 is slotted at 1|a and receives a stud 12a having a head 13 which is transversely bored and threaded at 14 to receive threaded adjustment rod 15. This slot 1|a enables the stud 12a to be moved in a straight path while track member I8 is adjusted in' an arcuate path about pin 53 as a pivot. The head 13 may be split as indicated at 16 (Figure 2) so that one part may be sprung slightly with respect to the other so as to hold the rod 15 securely and prevent lost motion.

From the description so far pursued, it will be apparent that the meter drives the shaft l6 which, through the coupling member l4, l5 drives the driving member l2 in clockwise direction. The lower ball clutch driving member 3| rotates therewith and the balls 39 thereof wedge between the clutch drum 21 and recess wall 42 to grip and rotate the drum, while the drum idles over the balls of the upper clutch member 33. Fol-- lower arm 62 is pivoted on the driving member 2 to rotate therewith and when the tracks 1| and 12 of cam 54 are concentric with the clutch drum 21, the roller 68 therein moves in a true circle and the angle from the center of pin 6| subtended between the center of shaft 22 and the contact point of roller 68 with track 1| remains constant so that there is no relative angular movement between the gear teeth 64 on the follower arm and the central gear 46, and the shaft 22 is driven at the same speed as shaft |6. However, when the tracks 1| and 12 are adjusted so that they are not concentric with the clutch drum 21, as indicated by dot and dash line Er, Figure 6, the roller 68 will move in an eccentric circle and the angle above referred to will gradually increase and decrease in a periodic cycle. During the portion of the rotation that the angle decreases, gear teeth 64 rotate about pivot pin 6| member 33 with it in clockwise direction at a greater angular velocity than that of lower ball clutch 3|, so that the clutch drum 21 is overdriven by the upper ball clutch driving member while the drum idles over the balls of the lower clutch driving member 3|. During the portion of the rotation that the angle increases, the clutch drum 21 is driven by the lower ball clutch driving member 3| and the drum idles over the balls of the upper clutch member 33. It will be understood that it is of no consequence whether the apparatus is designed to produce an overdrive upon increase or decrease of the angle, this being merely a. matter of location of the arm on driving member I 2, disposition of the clutch members,

and other mechanical details. The eccentricity I of the cam tracks II and 12 may be adjusted by manually rotating the threaded rod or bodily axially moving the rod, and in the construction shown this adjustment is accom lished by moving the rod bodily in response to a temperature responsive element. Means is also provided for manually rotating the rod to move the head I3 thereon and thus adjust the eccentricity of the cam member 54.

The construction of the automatic temperature compensation of the register now will be described. The inlet connection 3 of the meter manifold has a bore 88 therein (Figure 2) communicating with the interior, and a well BI is formed surrounding this bore. The well may be inte ral with the inlet manifold or welded thereto. A bulb 82 containing a suitable fluid having a high co-eflicient of thermal expansion, such as, for example, acetone, is located in the inlet connection and has a tube 83 connected therewith extending through the bore 88, and through the bore 84 in the cover 85. The tube 83 may be welded to the cover as shown, or secured thereto in any other suitable manner, the cover being secured in place by bolts 86, there being a gasket 81 interposed between the cover and well to prevent leakage.

The register housing 5 has a flanged cup 88 or housing (Figures 1, 2 and 7) secured thereto by means of screws 88' passing through suitable holes in the flange 88 thereof and threaded into the register housing, the tube 83 communicating with the interior of this cup. A bellows 8! or other suitable pressure responsive mechanism is located in cup 88 and has a plate 82 secured thereto at one end which is welded or otherwise secured in fluid tight relation to the housing wall at 83, and at the other end the bellows carries a collar 84 brazed or otherwise suitably secured thereto in fluid tight relation. A hollow bushing 95 has a reduced end 86 which fits into the collar 84 and is brazed or otherwise suitably secured thereto in fluid tight relation. It will be apparent that any change in volume of fluid in the bulb 82 due to changes in temperature of the liquid being metered, will cause movement of the bellows 8| and thus axially move the bushing 85 which is secured to one end thereof.

A flanged housing member 81 secured to the register case by screws 88' has a bore 88 at its tapered end. An adjustment screw retainer 88 has a sleeve I88 extending into bore 88 through which extends the adjustment screw 15 and the other end of the retainer is threaded at IM to hold the adjustment red. A flange I82 on the retainer is splined at its outer periphery and is received in an internally splined collar I83 located in vbore I84 of housing 81. Collar I83 is held in position by a flanged collar retainer I85 held in assembled relation to housing 81 by screws I88 passing through flange I81 of the housing and flange I88 of the retainer, and is kept from rotating by a pin II2 extending through the collar I83 and retainer I85. One end of a weak spring I88 abuts a shoulder 8 formed by a bore II I in the housing 81, the other end of the spring abutting the flange I82 of the rod retainer and urging the retainer 88 and. adjusting rod I5 outward. Outward movement of rod retainer 88 is limited by a spring holder II4 located in the bore II5 of collar retainer I85. The spring holder has a hollow sleeve I I6 therein which is held against removal by a retaining washer III held on an internal shoulder of the 75 6 spring holder by turningover the end thereof as indicated at I28. The internal flange I2I on sleeve Il6 abuts the end of bushing 85 and is held in abutting relation by a, stifi spring I22 located within the spring holder I I4 and abutting an internal flange I23 thereof at one end and the internal flange I2I of the sleeve H6 at the other end.

The operation of the thermal compensation mechanism is as follows:

When the bushing 85 moves inward in response to an increase in volume of the thermal fluid, it forces the piston or sleeve 8 inwardly, and motion of sleeve H6 is transmitted to the rod retainer 88 by the stifiI' spring I22. This urges the retainer and rod I5 inward against the resistance of spring I89 which is relatively weak, Spring I22 is stitl enough so that it is not deflected, the purpose of this spring being to prevent rupture of the bellows should the'temperature exceed the limits for which the apparatus is intended. This movement of the rod 15 shifts the cam 54 carrying tracks Ii and I2 and changes its concentric or eccentric relation with respect to the driven shaft 22 and thus changes the extent of overdrive between the meter driven shaft I8 and the register driving shaft 22. When the volume of fluid surrounding the bellows shrinks due to a decrease in temperature, the spring I88 causes retainer 88 and rod I5 to follow the sleeve 85 as it moves to the (right, thus restoring the position of cam 54 and tracks 'II and I2. It will be understood that the adjustment may be originall set so that at a standard temperature the cam tracks II and I2 are displaced about one half of their possible eccentricity, so that a corresponding amount of over-drive is provided. The preferred manner of adjustment is to provide such change gears between the meter and adjustment mechanism so that with the adjustment at concentric position the register runs slow for standard temperature, and then by manually adjusting the adjustment rod I5the cam track is moved eccentrically to compensate for the slow drive until the register indicates accurately at standard temperature. This adjustment may be accomplished by rem0V- ing the threaded plug I25 (Figure 2) at the end of the casing and inserting a screw driver in the kerf in the end of the collar I28 pinned by pin I21 to rod I5, and rotating the rod. Such adjustment is permitted by the thermal responsive means as the threads I38 on the rod passing through the stud 12a in the cam are f different pitch than threads I3I passing through retainer 88 in the thermal adjustment, so that a differential or micrometer adjustment is obtained.

Referring to the modification shown in Figures 8 to 11, wherein like parts are correspondingly numbered, there is shown a fragmentary section of a meter case I4I enclosing a metering mechanism of any suitable type and driving the driving shaft I42 passing through the stufiing box I43, a driving pinion I44 being suitably mounted on the end of the shaft. The pinion I44 drives a spur gear I45. The gear I45 fits over the hub I48 of a driving member I41 and is secured thereto by machine screws I48 or by any other suitable means. The driving member I41 and gear assembly is loosely rotatable on a. stub shaft I48 which is suitably journalled in the meter casing.

The driving member I4I has a central depression I52 which receives a clutch drum having a cylindrical clutch wall I53 and a circular head I54 to which is secured the eniarged fluted 7 end of driven shaft I55, a stub I56 thereon extending into and being loosely journalled in the hub I46. The other end of shaft I55 is journalled in any suitable manner in an intermediate plate- -two similar annular cover plates I68 and I69 which are riveted or otherwise secured to the middle plate I64, and have turned in portions I1I which prevent the balls I66 from falling out of the recesses. The arrangement is such that when the primary clutch turns counterclockwise, as seen Figure 10, the balls I66 will grip the drum I53 so that the drum and shaft I 55 v will rotate in unison with clutch I6I.

Within the drum I53 is a secondary similar one way clutch assembly, designated generally by the numeral I12, and similarly constructed with portion I13 received in the tangential recesses I14 and urged outwardly by springs I15. The secondary clutch assembly I12 is freely'rotatable on the driven shaft I55, and the arrangement of recesses therein is such that when the drum I53 is driven by the outer clutch I6I the clutch dr-um I53 idles over the balls I13 of the secondary clutch.

A compensator arm I16 is riveted or otherwise secured to secondary clutch assembly I12 and is rotatable therewith about driven shaft I55. A driven link I 11 is pivotally secured at one end of primary clutch I6I by the shouldered screw I62, threaded into a suitable threaded bore I18 in the driving member I41, and an enlarged roller I19 is carried at the other end I80 of this link.

of suitable gearin8., The plate has a threaded bore I89 and the movable circular track I86 is secured thereto by a shouldered screw I90 passing through a suitable bore in the flange I9I of the track into the bore I89, a spring I92 being interposed between the head of the screw and the flange to keep the track pressed against the central wall. Diametrically opposite, a stud I93 is suitably swivelly secured in a slot in the flange I9I, the stud having a threaded bore I94 therethrough. This slot enables the stud I93 to be moved in a straight path while track member I86 is adjusted In an arcuate path about pin I90 as a pivot.

The thickened rim portion I95 0f the intermediate plate has a horizontal threaded bore I96 and a threaded counterbore I91 therein, and adjustment rod having a kerf in its end is threaded into the hole I94 in the stud I93 and is threaded for a part of its length extending through the bore I96. These threads are of different pitch so that a micrometer adjustment is secured. This rod 15 is preferably made of brass or other material having a high coefficient of thermal expansion so that changes in temperature of this rod will change its length and I produce an adjustment of the register drive The roller is secured to the top of the link I11 by a shouldered screw I8I with a suitable antiiriction washer interposed between the roller and end of the screw, and the rounded end I80 0f the link engages the compensator arm I16. A spring I82 is coiled about the shouldered screw I63 threaded into a bore I83 in the driving member I41, and urges the link and compensator arm into contact, and a pin I84 threaded into a suitable bore I85 in the driving member I41 serves as a, fulcrum to flex the spring. The spring I82 urges the compensator arm I16 against the rounded end I80 of the link I11, thereby urging the link I11 outwardly to maintain roller I 19 at all times in engagement with circular track I86. When the track I86 is concentric with driven shaft I55, the roller I19 moves in a path concentric with the shaft I55 and, therefore, as the primary clutch I6I rotates the link I11, the angle subtended at the center of shaft I55 by pin I62. and the contact point of roller I19 with track I86 will be constant. Under this condition, the outer clutch I6I will rotateclutch drum I53 and will rotate inner clutch I12 by the pushing action of link I11 on arm I 16 at the same speed, so that there is no relative angular movement between outer clutch I6I and inner clutch I12.

The intermediate plate I51 secured to the top of the meter case I4I has a central boss I88 in which driven shaft I55 is journalled, the shaft I55 directly driving a register (not shown) of any suitable construction, or by the interposition mechanism. Thefluid to be measured 'by the meter, or a. portion thereof, may be conducted in any suitable manner from the meter, as for example, through the pipe connection I99 to the chamber formed by wall I51 in which screw 15 is located, so that the rod 15 responds to the temperature of the fluid to be measured. A plug I98 is located in counterbore I91 and has a hole therethrough for the reception of a wire and lead seal.

The principle of operation of this modification is substantially like that heretofore described. When the track I66 is coincident with the driven shaft I55, the angle subtended at the center of shaft I55 by the screw I62 and contact point of roller I19 on cam track I86 remains constant. When the track I86 is eccentric with relation to the driven shaft I55 the angle will gradually increase and decrease in a periodic cycle, due to the roller I19 moving radially outward and the tendency of compensator arm I16 to follow the roller because of the bias of spring I82. In this modification, as the arm I16 is directly connected with the interior clutch I12, a decreasing angle produces an overdriveand an increasing angle permits the clutch drum to idle. over the balls I13 of the secondary one way drive. The thermal expansion of rod 15 will adjust the track I 86 in accordance with the temperature, and the track may be manually adjusted by removing the plug I98 and turning the rod 15 with a screw driver or other suitable tool.

Where the register or bellows are subject to ambient temperatures which would introduce an error into the adjustment mechanism, this error may be compensated by introducing a temperature compensating connection between the bellows and cam. This may conveniently be done as shown in Figure 12 by replacing the stud 13 by a square nut 20I having a threaded bore 202 therein to receive the rod 15, the nut being slidalbly held against rotation in the space between the cam flange 55 and top wall 20. A temperature responsive bi-metallie element 203 in the form of a U has one end soldered in a slot 204 at the end of the nut, the other end 205 being bifurcated to receive the rod 15 and one of the bifurcations being slidably received between two small pins 206 riveted into the cam flange 55. The mechanical connection between the square nut and cam 54 thus is made through the bimetallic element, which is so adjusted and callbrated that movement of the rod 15 caused by ambient temperatures afiecting the fluid surrounding the bellows will be taken up by deflection of the bi-metallic element under the same ambient temperature change and thus produce no movement of the cam. However, temperature changes in the fluid in the bulb will move the cam because they will not be counteracted by the bi-metallic element. If desired, the calibration of the bi-metallic element can be such as to compensate also for change in length of rod IE or' embodiment, therefore, is to be considered as illustrative merely of the invention.

Having described my invention, what I claim and desire to secure by Letters Patent is:

1. The combination comprising a register, a fluid flow responsive mechanism for measuring the flow of fluid therethrough, a plurality of one.

said register, one way drive means to intermittently overdrive said register when operated in one direction, and temperature responsive means for varying the extent of operation of the one way drive means. v

3. The combination comprising a casing, a fluid flow responsive mechanism in said casing, a register, fixed ratio means operated by said fluid flow responsive mechanism and operatively connected to said register, a one way drive means to intermittently overdrive said register when operated in one direction, a guiding track for governing the movement of said one way drive means, and temperature responsive means for varying the position of said track.

4. The combination comprising a casing, a fluid flow responsive mechanism in said casing, a driving shaft driven thereby, a register, a driven shaft for driving the register, fixed ratio one way drive means operated by said driving shaft to drive said driven shaft, a second one way drive means to intermittently overdrive said driven shaft when turned in the operating direction of the fixed ratio one way drive means, a guiding track for governing the movement of said second one way drive means, and temperature responsive means for varying the position of said track.

5. The combination comprising a fluid flow responsive mechanism for measuring the flow of fluid therethrough, a register, a plurality of one way driving means between the register and said fluid flow responsive mechanism, orbit means for governing at least one of said one way driving means, and temperature responsive means for adjusting the axis of said orbit means to vary the extent of drive of the one way drive means.

6. The combination comprising a casing, a fluid flow responsive mechanism in said casing, a driving shaft driven thereby, indicating means, a driven shaft for operating said indicating means, means rotated by the driving shaft and havin a fixed ratio driving engagement with the driven shaft, orbit means mounte on the casing, one way driving means actuatediby said orbit means for imparting an intermittent impulse drive to said driven shaft, and temperature responsive means for adjusting the axis of the orbit means to vary the extent of impulse drive- 7. The combination comprising a mechanism responsive to flow of fluid therethrough, a driving shaft driven thereby, a register, a driven shaft for driving said register, a plurality of one way driving means between the driving shaft and driven shaft, means providing an orbit means, means carried with one of said one way driving means and guided by the orbit for goveming the other of said one way driving means, and means responsive to the temperature of fluid passing through said mechanism for adjusting the axis of said orbit means to vary the extent of drive of the one way drive means.

8. The combination comprising a casing, a fluid flow responsive mechanism in said casing, av driving shaft driven thereby, a register, a driven shaft for driving the register, fixed ratio means operated by said driving shaft and 0peratively connected to the driven shaft, a one way drive means, means movable in an orbit for varying said one way drive means to impart an overdrive to said driven shaft, and means responsive to the temperature of the fluid being measured for varying the orbit of movement of said means.

9. The combination comprising a casing, a fluid flow responsive mechanism in said. casing, a register, a multiple speed transmission having a fixed ratio means and a variable ratio means alternately driving said register, orbit means for controlling said variable ratio means, and temperature responsive means for varying said orbit means to change said variable ratio means.

10. The combination comprising a casing, a fluid flow mechanism in said casing, an indicator, a multiple speed transmission including a direct drive coupling said indicator and fluid flow responsive mechanism and rotated oscillatable means for varying said transmission, and temperature responsive means for varying the stroke of said osclllatable means.

11. The combination comprising a fluid meter, a register, a fixedly journalled register driving shaft, a second fixedly journalled coaxial shaft driven by the fluid meter, variable drive means coupling said shafts, orbit means for controlling said variable drive means, and temperature responsive means for shifting said orbit means to correct for changes in temperature of the fluid being measured.

12. The combination comprising a fluid meter, a register, means operated by the meter and operatively connected to said register, a one way drive means operated by the meter to drive said register when operated in one direction, a' guiding track for governing the movement of said into which said rod is threaded, spring means biasing said retainer and rod in one direction, temperature responsive means for varying said adjustment rod and yieldable means interposed between said temperature responsive means and said retainer for transmitting the action of the temperature responsive means to the variable drive means. v

14. The combination comprising a. register, fluid flow responsive mechanism, variable drive mechanism between said register and fluid flow responsive mechanism, a housing, a retainer in said housing, means hold-ing said retainer against rotary movement, an adjustment rod connected to said variable drive mechanism and extending into said housing and threaded into said retainer, a spring biasing said rod and retainer in one direction, an expansible bellows, spring means interposed between said bellows and retainer, and temperature responsive means including a thermal expansive fluid for moving said bellows to adjust said variable drive mechanism.

, 15. The combination comprising a casing, a fluid flow responsive mechanism in the casing, a register, variable drive means connected between said flow responsive mechanism and said register, temperature responsive means, and transmitting means between said temperature responsive means and variable drive means comprising an adjustment rod, a movable retainer receiving said adjustment rod and guiding movement thereof, spring means biasing said retainer and rod in one direction, yieldable means interposed between the temperature responsive means and said retainer, and means for manually adjusting said variable drive means relative to said temperature responsive means.

16. The combination comprising a fluid meter, a register, a fixedly journalled register driving shaft, a. second fixedly journalled coaxial shaft driven by the fluid meter, variable drive means coupling said shafts, orbit means for controlling said variable drive means, temperature responsive means for shifting said orbit means to correct for changes in temperature of the fluid being measured, and manually adjustable means for adjusting the position of said orbit means with relation to the temperature responsive means.

1'7. The combination comprising a register, a fluid flow responsive mechanism for measuring the flow of fluid therethrough, a plurality of one way drive means between said register and fluid flow responsive mechanism, a track providing an orbit to govern the movement of the one way drive means, temperature responsive means for varying said track to correct for changes in temperature of the fluid being measured, and manually adjustable means for adjusting the position of said track relative to the temperature responsive means.

18. The combination comprising a mechanism responsive to flow of fluid therethrough, a. driving shaft driven thereby, a register, a driven shaft for driving said register, a plurality of one way driving means between the driving shaft and driven shaft, means providing an orbit, means carried with one of said one way driving means and controlled by the orbit for governing the other of said one way driving means, a, movable rod for adjusting the axis of said orbit means, temperature responsive means including an expansible chamber containing a thermal expansible fluid connected to said rod for adjusting the position of said rod to vary the extent of drive of the one way drive means, and a spring biasing/ responsive to flow of fluid therethrough, a driving shaft driven thereby, a register, a driven shaft for driving said register, a plurality of one way driving means between the driving shaft and driven shaft, means providing an orbit, means carried with one of said one way driving means and controlled by the orbit for governing the other of said one way driving means, means responsive to the temperature of fluid passing through said mechanism for adjusting the axis of said orbit means to vary the extent of drive of the one way drive means, and manually operative mean for adjusting said orbit means independently of said temperature responsive means.

20. The combination comprising a mechanism responsive to flow of fluid therethrough, a driving shaft driven thereby, a register, a driven shaft for driving said register, a plurality of one way driving means between the driving shaft and driven shaft, means providing an orbit, means carried with one of said one way driving means and guided by the orbit for governing the other of said one way driving means, means responsive to the temperature of fluid passing through said mechanism for adjusting the axis of said orbit means to vary the extentof drive of the 1 one way drive means, and a second temperature responsive means interposed between said orbit means and said first temperature responsive means for correcting for ambient temperature changes.

21. In a fluid metering apparatus for measuring the volumes of liquids at predetermined base temperatures comprising in combination a displacement mechanism, a register, and an ad- 9 justable infinite ratio speed change mechanism connected to be driven by said displacement mechanism and connected to drive said register; a movable arm controlling the speed ratio of said speed change mechanism; a spring biased axially movable assembly slidably engaging said movable arm; thermostatic means responsive to the temperature of liquid being metered engaging and movable axially of said assembly; and means in said assembly located between said arm and said 50 thermostatic means for adjusting said assembly to change the speed relationship of said speed change mechanism.

22. In combination with a fluid metering apparatus including a displacement mechanism, a register and a variable ratio speed change mechanism connected between said displacement mechanism and said register, a member controlling the speed ratio of said speed change mechanism, and means to actuate said last named member comprising thermostatic means subjected to the temperature of the fluid passing through said displacement mechanism and further thermostatic means subjected to the ambient temperature of the atmosphere surrounding the apparatus,

23. In combination with a fluid metering apparatus including a displacement mechanism, a register and a variable ratio speed change mechanism connected between said displacement mechanism and said register, a member controlling the speed ratio 01' said speed change mechanism, an element to operate said last named member, thermostatic means subjected to the temperature of the fluid passing through said displacement mechanism to operate said element,

and further thermostatic means subjected to the ambient temperature of the atmosphere sur rounding the apparatus to control said element whereby said element is responsive to temperature changes of the fluid alone.

24. In a metering system, a displacement mechanism; a register; a variable ratio speed change mechanism connected between said displacement mechanism and said register including track means to control said speed change mechanism; an axially movable rod slidably connected to said track means; means responsive to the temperature of the liquid passing through said displacement mechanism movable axially of and directly actuating said rod; and manually settable means to adjust the position of said track means, and said rod actuating means with relation to said rod.

25. In a fluid metering apparatus for measuring the volumes of liquids at predetermined base temperatures comprising in combination a displacement mechanism, a register, and an adjustable ratio speed change mechanism connected'to be driven by said displacement mechanism and connected to drive said register; a movable arm controlling the speed ratio of said speed change mechanism; a sli-dable actuating rod slidably engaging said movable arm; resilient means urging said rod in one direction; thermostatic means responsive to the temperature of liquid beingmetered movable axially of and actuating said rod in opposition to said resilient-means; and means for adjusting the speed relationship of said speed change mechanism with respect-to the position of said thermostatic means.

26. In a measuring system of the type that comprises a casing, a meter, a speed change mechanism and a register in which the speed REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,156,812 Hazard May 2, 1939 2,059,547 Brandi Nov. 3, 1936 2,129,066 McGogy Sept. 6, 1938 1,881,572 Herz Oct. 11, 1932 1,978,362 Fonseca Oct. 23, 1934 2,206,540 Whittaker July 2, 1940 2,191,766 Marsh Feb. 27, 1940 2,093,151 MacLean Sept. 14, 1937 1,621,203 Houghton Mar. 15, 1927 1,608,231 Bradley Nov. 23, 1925 1,278,077 Reeve Sept. 53, 1918 1,794,612 Halsey Mar. 3, 1931 585,711 Smith July 6, 1937 1,515,810 Giesler Nov. 18, 1924 1,453,769 Sandvoss May 1, 1923 2,141,520 Dube Dec. "27, 1938 2,055,280 Dodson Sept. 22, 1936 2,302,529 Cornell et a1. Nov. 17, 1942 2,208,687 Renfrew July 23, 1940 2,222,551 Ziebolz ct a1. Nov. 19, 1940 FOREIGN PATENTS Number Country Date 493,202 Great Britain Oct, 5, 1938 

